1、功能要求：
实现在一个指定区域拖拽div,并可以放大缩小，同时显示鼠标在该div里的坐标，如图可示
缩小并拖动
2、实现
<div class="div_content" ref="div_content"><div class="div_image" id="pic":style="{'zoom':zoom,'transform':'translate('+moveX+'px,'+moveY+'px)',}"@mousedown.stop="mousedown($event)" @mousemove="handleMouseMove" @mouseleave="mouseout"></div><div class="div_image_tool"><img src="..." class="div_add " @click="add_img"><div class="heng"></div><img src="..." class="div_add div_decrease" @click="dec_img"></div></div><div class="div_axirs">X:{{ux}} Y:{{uy}}</div>
js代码
data(){return{ux: 0,uy: 0,moveX: 0,//X轴移动的距离moveY: 0,startx: '',//鼠标的初始位置starty: '',endx: 0,endy: 0,zoom: 1,//放大的倍数
}
},
methods:{add_img() {this.zoom <= 10 ? this.zoom = this.zoom + 0.5 : ''},dec_img() {this.zoom > 0.5 ? this.zoom = this.zoom - 0.5 : ''},mousedown(e) {// 绑定mousemovethis.startx = this.formatXY(e.pageX / this.zoom); this.starty = this.formatXY(e.pageY / this.zoom)document.onmousemove = (e) => {this.moveX = this.formatXY(e.pageX / this.zoom) - this.startx + this.endxthis.moveY = this.formatXY(e.pageY / this.zoom) - this.starty + this.endye.preventDefault()};document.onmouseup = (e) => {// 解除绑定mousemovedocument.onmousemove = null;this.endx = this.moveXthis.endy = this.moveY;}},mouseout() {var that = this;that.ux = 0;that.uy = 0;},handleMouseMove(e) {this.getAxis(e)},getAxis(e) {this.ux = this.formatXY(e.offsetX / this.zoom);this.uy = this.formatXY(e.offsetY / this.zoom);
},formatXY(num) {return num.toFixed(0)},}
css
.div_content {position: relative;width: 600px;height: 580px !important;margin: 0 20px;overflow: hidden;background: rgb(230, 229, 229);}.div_image {height: 400px;width: 400px;background: white;margin: 100px auto auto 100px !important;}
)
